Mine was strange. Had brand new construction in a new development. Due to various reasons start was delayed, as well as construction delays due to hurricanes.
Base price of the house when we signed the purchase contract was $199,000. We had $38,000 in customizations and upgrades bringing it to $237,000. However, in the 15 months between contact signing and closing the base price of that model went up by $55,000, so when I went to closing the value was $292,000.
We had to put down $5,000 when we signed the contract and another $15,000 was due two months later. We paid $3,000 as a redraw fee, and when all the customizations and upgrades were figured out we had to come up with another $19,000 (which was half of the upgrades and customizations), for a total $42,000 before any construction started.
When I went to closing I came up with another $100,000 so my down payment was effectively $142,000. But then the mortgage only started at $102,000 and after a little more than a year is down to about $96,500.
Actually the bank (BofA) also offerred me a $110,000 HELOC but I said keep it to the IRS deductibility maximum of $100,000 and so I have the unused line and only $96,500 mortgage balance on a home currently valued at about $350,000.